What Is It?
A boiler service record is a structured document completed during an annual heating appliance service. It records the appliance details, the visual condition checks, the operation of controls and safety devices, the state of the flue and ventilation, and the results of any combustion analysis. It is the service history for the appliance — distinct from a gas safety record (CP12), although the checks overlap heavily on a gas boiler. The same form suits gas, oil, and modern heat-pump systems with the relevant sections completed.
About This Template
A boiler service record is the written evidence that a heating appliance has been inspected, tested, and confirmed safe to operate for another year. An annual service keeps a boiler running efficiently, protects the manufacturer's warranty, and is the documentation a heating engineer hands to the customer and, where the property is rented, to the landlord. Work on a gas boiler must be carried out by a Gas Safe registered engineer; oil appliances are the province of OFTEC registered technicians. A consistent, well-completed service record protects the engineer in any later dispute and gives the customer a clear history of the appliance's condition.
When to Use
- At every annual service, which is the interval most boiler manufacturers require to keep the warranty valid
- When a landlord asks for a service in addition to the annual gas safety check on a let property
- After installing a new boiler, where the first service falls due 12 months after commissioning
- When taking on an unfamiliar appliance and you want a baseline record of its condition
- Before a property sale or purchase, where a recent service reassures the buyer
- When a customer reports intermittent faults and you want a dated record of the appliance's state
What to Include
- Property address, customer name, and contact details
- Appliance details: make, model, type (combi, system, regular, oil, heat pump), GC or serial number, and location
- Engineer name, registration number (Gas Safe or OFTEC), and service date
- Visual inspection: appliance casing, seals, heat exchanger, burner, and signs of corrosion or distress
- Controls and safety devices: thermostat, time clock, flame supervision, overheat and pressure-relief operation
- Flue and ventilation: flue condition, termination, integrity, and adequacy of any required air vents
- Flue flow and spillage test results where applicable
- Combustion analysis readings — CO, CO₂, and the CO/CO₂ ratio — recorded against the manufacturer's stated range
- System operating pressure and condensate pipe condition and routing
- Defects identified, remedial action taken or recommended, and any parts replaced
- Overall outcome: safe to use, or warning notice issued, with the customer's signature and the next service date
Tips
Always carry out and record a combustion analysis with a calibrated analyser — the readings are the strongest objective evidence that the appliance is burning safely
Follow the appliance manufacturer's published service schedule; it specifies which components must be inspected, cleaned, or replaced and overrides any generic checklist
If you find an immediately dangerous or at-risk situation, follow the Gas Industry Unsafe Situations Procedure (or the OFTEC equivalent for oil) and record the warning notice reference on the service record
Photograph the flue termination, the appliance data badge, and any defects — images settle disputes and support warranty claims far better than notes alone
Give the customer a copy and keep your own for at least six years, and remind them when the next service is due so the warranty stays intact
